Question

Eric reflected parallelogram ABCD across the x-axis. If angle A is 125° and angle B is 55°, what is the degree measurement of angle A'?

Answer 1

A’ is 125˚

Explanation:

The only thing you are doing is reflecting it. It does not matter what kind if its a reflection over x or y. The angle does not change. Look up any kind of reflection and you can see that nothing is done to the angles of the reflected object. That’s why you can conclude that A’ is 125˚

Answer 2

The measures of the angles don't change when you translate a figure, because the entire figure is moving as a whole. Imagine having a paper parallelogram, moving it around and flipping it over. Not even dilations would change these angles (for reasons that can be pretty easily visualed but not really proven until geometry)


`m\angle A'=125\°`